On-board computer event window 139 BlueTec ® exhaust gas aftertreatment Compressed-air system On-board computer and displays Z Display messages Possible causes/consequences and M Solutions  Diesel particle filter full Supplementary text Û: Stop vehicle. Consult service centre. Regeneration is no longer possible. The  indicator lamp also lights up red in the instrument clus- ter. The diesel particle filter has reached its soot saturation limit. Engine performance is reduced and manual regeneration is no longer possible. X Clean the diesel particle filter as soon as possible or have it replaced at a qualified specialist workshop.
Display messages Possible causes/consequences and M Solutions \ Example:Brake sup‐ ply pressure in circuit 1 too low In addition, the J warning lamp lights up red in the instrument cluster. The reservoir pressure in brake circuit 1 \ or 2 ^ is too low. If the reservoir pressure in the spring actuator and the trailer's brake circuit is too low, the event window shows the J symbol. Possible causes: Rtoo much compressed air has been consumed. Rthere is a leak in the compressed-air system. G WARNING The operating and road safety of the vehicle are jeopardised. There is a risk of an accident. X Stop the vehicle as quickly as possible, paying attention to traf- fic conditions.
X Apply the parking brake. X Start the engine. The compressed-air system is charged. If the J warning lamp in the instrument cluster goes out: X Continue the journey. If the J warning lamp in the instrument cluster does not go out: X Check the compressed-air brake system for leaks (Y page 163). X If the compressed-air brake system is not leaking, but the J warning lamp does not go out: have the compressed-air brake system checked at a qualified specialist workshop.